<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>WebSocket客户端</title>
</head>
<body>

<script type="text/javascript">
    var socket;
    if(window.WebSocket){
        socket =new WebSocket("ws://localhost:8899/ws");
        socket.onmessage =function(event){
            var ta =document.getElementById("responseText");
            ta.value =ta.value +"\n"+event.data;
        }
        socket.onopen =function(event){
            var ta=document.getElementById("responseText");
            ta.value ="连接开启!";
        }
        socket.onclose =function(event){
            var ta =document.getElementById("responseText");
            ta.value=ta.value +"\n"+"连接关闭!";
        }
    }else {
        alert('浏览器不支持WebSocket!')
    }

    function send(message){
        if(!window.WebSocket){
            return;
        }
        if(socket.readyState ==WebSocket.OPEN){
            socket.send(message);
        }else {
            alert("连接尚未开启!");
        }
    }

</script>

<form onsubmit="return false;">
    <textarea name="message" style="width: 400px; height:200px"></textarea>
    <input type="button" value="发送数据" onclick="send(this.form.message.value)">
    <h3>服务端输出：</h3>
    <textarea id="responseText" style="width:400px;height:300px;"></textarea>
    <input type="button" onclick="javascript:document.getElementById('responseText').value='" value="清空内容">
</form>

</body>
</html>